US2848150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanics' ladders
Assignee: Individual
•
Filing: 1955-01-24
•
Granted: 1958-08-19
•
Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 Lester F Tans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:55
CPC Classifications
B; B25; B25H; B25H5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US491093A
Cited
US557063A
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US602125A
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US917805A
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FR414564A
Cited
US1039647A
Cited
US1205594A
Cited
US1240301A
Cited
US2378678A
Cited
US2494581A
Cited
US2639951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |